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2.2 符 号

    英文缩写                     英文名称                                         中文名称
    3G                           The third generation                             第三代移动通信系统
    AMR                          Adaptive multi rate                              自适应多速率
    ATM                          Asynchronous transfer mode                       异步传输模式
    BBU                          Baseband unit                                    基带单元
    BCCH                         Broadcast control channel                        广播控制信道
    BTS                          Base transceiver station                         基站
    DC                           Direct current                                   直流
    FDD                          Frequency division duplex                        频分双工
    GSM                          Global system for mobile communications          全球移动通信系统
    LTE                          Long term evolution                              长期演进
    MSTP                         Multi-service transfer platform                  多业务传送节点
    PA                           Power amplifier                                  功率放大器
    PSU                          Power supply unit                                电源供电单元
    PTN                          Packet transport network                         分组传送网
    RFU                          Radio frequency unit                             射频单元
    RNC                          Radio network controller                         无线网络控制器
    RRU                          Remote radio unit                                射频拉远单元
    SDH                          Synchronous digital hierarchy                    同步数字系统
    TD-SCDMA                     Time division-                                   时分-同步码分多址
                                 synchronization code                             接入
                                 division multiple access
    UE                           User equipment                                   用户设备
    UMTS                         Universal mobile telecommunications system       通用移动通信系统
    WCDMA                        Wideband code division multiple access           宽带码分多址